Process of making capsules.



No. 647,993. Patontd Apr. 24, I900. .1. SCHMIDT.

PROCESS OF MAKING CAPSULES.

(Application filed Aug. 29, 1899.)

(NoModeL) WIIWESSES.

AITDRNEYS.

Uurrsn Sfrarss JOIIANN scuninr, or NUREMBERG,GERMANY.

paoosss OF MAKING CA SULES.-

SPECIFICATION forming part of Letters JEa'tent N 0. 647,993; dated Apri1'24', 1900'. Application filed August 29, 1899- Serial No. 728,869. (No specimens.)

To all whom it may conccrm.

Be it-known that I, JOHANN SCHMIDT,a subsame before they were baked or by effecting this subsequent to the baking or'partial hardening process; but in both cases it has only been possible to p rod uce proportion ately-shallow capsules.

According to the present invention capsules of any desired depth may be easily produced from corresponding sheets of wafer material by first cutting a series of zigzags in the upper edge of a rectangular sheet, then bending the same to form a cylinder, and wettingthe adjacent edges to cause them to stick together. The upper scalloped orzigzag edge, which is destined to form the upper rounded crown of the capsule,is then pressed onto a suitable form by means of a pressure-cap, and simultaneously the seam of the cylinder is compressed, so that it almost disappears, the material at the top and at the seam being approximately of uniform thickness with the rest of the capsule after -the pressure part of the process has been carried out.

In order to render the present specification more easily intelligible, reference is had to the accom pan ying drawin gs, in which similar let- .ters of reference denote similar parts throughout the several views. Figure 1 is a planet the piece of material. out ready for making the capsule; Fig. 2, an elevation of the cylinder. formed therefrom; Fig. 3, a perspective elevation of. the tongs for pressing the sheet around the form; Fig. 4, a section through the shell of the tongs and the capsule after it has been pressed around the form, and Fig. 5 a similar seetion showing the 'means for applying pressure to the crown after the operation illustrated in Figs. 3 and 4 has been carried out.

Fig. (5 is a sectional elevation of a device for forming the capsule by means of a Single lever, which is'moved once backwardand forward, the parts beingin-positionto press-the sheet of material around the formfl Fig j7-is a plan of Fig. 6. Fig. 8 is a similar elevation to that. of Fig. 6, showing the formation of the crown of the capsule; andFig. 9, a plan of the parts correspondingtothe position shown at Fig. 8."

The upper edge of the sheet of material a is notched or scalloped, as at b, and the sheet" then bent to form a cylinder, Fig.2. The

scalloped upperedge is then bent overtojg'orin the crown of the capsule by means ofthe' tongs f, Fig. 3,h'avingcorrespondingly-shaped' e, as shown in section at Fig; 4. After the material has thus been fitted around thetorm the pressurecap i, Fig. 5, is applied thereto, whioh'renders the rnaterial of the crown of shell-halves g and h, which fit over theform'.

an approximately-even thickness, and the capsule may be taken off the form ,be'ing ready fol-use. p

The device shown in Figs. Gto 9is formaking the capsules by means of a single lever at one operation. The hand-lever Z, having the handle so, is pivot-ally mounted in thema chine-frame natt and is. provided with a slot 5 in which the pivot s of a block r mayslide, the ends of the said pivot being guided in slots 11 of stationary guide-blocks. 'lo the block 1' are pivotally connected the links-p p of the pivotally-mounted toggle-levers m m, at the free ends of which the shells g and, h

are mounted, said shells being pressed ontofj the form e when the said hand-lever is pressed to the right in the direction of the arrow 1n,

Fi 6. exilending downwardly through the table n and having a spring to normally hold the same in'its lowest position, as indicated at f. The lower end of the lever'l is pivoted to a link it, the other end'of which is pivoted to the short arm of the bell-crank lever w, the

free end of which is adaptedtocontaot with the lower end of the stem 3 and force the form 6 upwardly against the pressure of its springf, as is illustrated at Fig. 8; A stationary but adjustable pressure-cap k. is mounted vertically above the form e, and the same may be adjusted vertically in the stan.d' ard z'by means of a set-screw. Thus when the lever is reversed the toggle-joint will act The form e is mounted on a stem 11 to pu sl'fa-part the halves of the shell, and as soon as thishas taken place the arm "w will lift the form by contact with thelower end of its stem, forcing the material on the same- 5 against thepressure-cap k.

Thus the capsule willbeformed by twomovements of the lever l, the first serving to press the material around thelform and the backward movement serving to raise the capsule against the presto sure-capand complete the formation of the" same. The bell-crank lever w is pivotally I mounted at v.

fI' claim as myinventionp 'A process for producing capsules of wafer 1 5 materiel for medicine and other bottles which consists in firstscalloping the upper edge of a sheet of wafer material, then bendingthe sheet to form a cylinder having the scalloped edge at its upper end, and pressing the said edge around. to form the crown-of the capsule and finally applying a pressure-cap to the same in the manner and for the purpose sub stantially as described.

In witness whereof Ihave hereunto set my hand in presence of two witnesses. e

J OHANN SCHMIDT.

Witnesses:

CARL SCHMIDT, OSCAR BOOK.

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